| Budget Amount *help |
¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000)
Fiscal Year 2010: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
Fiscal Year 2009: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
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| Research Abstract |
The direct interaction of Rab33B, a regulator of membrane trafficking, with Atg16L1, an essential factor for autophagy, suggests involvement of Rab33B in the regulation of autophagy. Here, I identified OATL1, an uncharacterized TBC protein, as an inactivation factor of Rab33B and addressed the function of Rab33B in autophagy to inactivate Rab33B by OATL1. Overexpression of OATL1, which would inactivate endogenous Rab33B, delayed autophagosomal maturation in MEF cells. On the other hand, overexpression of active-form mutant of Rab33B also delayed autophagosomal maturation. These results indicate that Rab33B plays a role in the fusion between autophagosomes and lysosomes, a later process of autophagy.
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